poem of homage. Ibn-Ezra was very much surprised, and replied with an epigram, half complimentary, half insulting. His love of travel led him, now in his seventieth year, to foggy London, where he found a liberal Mæcenas, who treated him with affection. Here he composed a kind of philosophy of religion, written, however, with such extreme carelessness and haste, that it is absolutely impossible to follow his train of thought. On the whole, Ibn-Ezra accomplished as little in this branch of learning as in general philosophy. After this work on the philosophy of religion, while still in London, he wrote a defense of the Sabbath, which is interesting on account of its introduction. He begins by telling a dream which he had had, and in which the Sabbath in person handed him a letter. Herein the Sabbath complains that a disciple of Ibn-Ezra had brought writings into his house in which the Biblical day was said to begin in the morning, and that consequently the evening before the Sabbath possessed no sanctity. The apparition thereupon commanded him to take up the defense of the Sabbath. He awoke from his dream, and by the light of the moon read the impious writings which had been brought to him, and, in truth, found therein an assertion that the Biblical day began in the morning and not in the evening. This unorthodox doctrine, which, it may be remarked, was propounded by the grandson of Rashi, the pious Samuel ben Meïr, aroused Ibn-Ezra; and he felt himself in duty bound to controvert it with all his might, "lest Israel be led into error." In pious wrath he writes, "May the hand of him who wrote this wither, and may his eyes be darkened." The defense, which consists of the interpretation of Biblical verses and of astronomical explanations, bears the name of "The Sabbath Epistle." Although he was in prosperous circumstances whilst in London, and had many pupils, he left that city after a short stay. In the autumn of 1160 he visited Narbonne, and later on (1165 or 1166) he was again at Rhodez, where in his old age he revised his commentary to the Pentateuch, and abridged it, retaining the most essential portions, and finally composed his last book, a grammatical work (Safah Berurah). His vigor and freshness of intellect, which he retained even to the end of his life, are wonderful; his last productions, like his first, bear the imprint of vivacity, confidence, and youthful power. Besides his exegetical, grammatical, astronomical, and astrological writings, he was also the author of several works on mathematics. It appears that in his closing years Ibn-Ezra longed to return to his native land, and began his homeward journey. When, however, he reached Calahorra, on the borders of Navarre and Aragon, he died, and it is said that on his death-bed he wittily applied a Bible verse to himself: "Abraham was 78 years old when he escaped from the curse of this world." He died on Monday, 1st Adar (22d January), 1167.